Water Resource Management

Groundwater

Groundwater hydrology is an interpretive science: we can't observe the aquifers directly so we must interpolate and extrapolate our understanding from water-level measurements from observation wells. Stevens has expertise for measuring both water quantity and water quality.

Soil Monitoring

Over the past few decades, soil monitoring has become increasingly important. Environmental factors such as climate change, dwindling water resources, and threatened habitats are driving the need to monitor the environment and implement better policies to protect it. Many natural processes in the environment are driven by or in some ways related to soil hydrological processes. Monitoring soil moisture conditions provides important information for the protection of, and in the understanding of local and regional water resources.

Van Essen Diver Family

Pressure transducers with integrated data logger

Van Essen Diver logging sensors are submersible pressure transducers and data loggers for long-term uninterrupted, real-time water level monitoring when submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the sensor diaphragm to calculate the total water depth. The Diver autonomously measures pressure and temperature and records them in its internal memory. The Diver is ideal for ground and surface water level applications.

In addition to internal data storage, the Divers can be connected to an external data logger, such as the Stevens DataLogic 3000, or data telemetry systems with the Diver-SDI SDI-12 output adapter, allowing the Diver to be used for real-time data monitoring applications.

Manual data download in the field from a Diver’s internal storage can be done by utilizing the optional USB Interface Cable and connecting the diver directly to a desktop or laptop PC.

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TD-Diver

Designed for up to 10 years of use.

Solid enclosure to make borehole deployments easier.

Spend less time in the field with fast download speeds.

Large memory enables user to take a sample every 15 minutes for 2 years.

Enhanced data integrity with the new backup memory feature.

Compatible with all of your existing Diver accessories.

The TD-Diver is available in four ranges for monitoring the following depths:

0 – 33 ft (0 – 10 m)

0 – 66 ft (0 – 20 m)

0 – 164 ft (0 – 50 m)

0 – 328 ft (0 – 100 m)

Micro-Diver

The Micro-Diver provides reliable automatic measurement and registration of groundwater level and temperature data. Measuring a slim 0.7 inches (18 mm) in diameter and 90 mm in length, the Micro-Diver is the smallest groundwater level sensor in its class, and a great choice for monitoring wells that are too small to accommodate larger sensors.

The Micro-Diver is available in four ranges for monitoring the following depths:

0 – 33 ft (0 – 10 m)

0 – 66 ft (0 – 20 m)

0 – 164 ft (0 – 50 m)

0 – 328 ft (0 – 100 m)

Baro-Diver

The Baro-Diver provides reliable automatic measurement and registration of groundwater level and temperature data. Measuring 0.86 inches (22 mm) in diameter and 3.54 inches (90 mm) in length, it is a great choice for virtually any monitoring well.

The Baro-Diver is available with a measurement range of 4.92 ft (1.5 m). For each measurement, the Baro-Diver simultaneously registers barometric pressure, groundwater temperature, date and time.

Based on proven, innovative technology, the Baro-Diver has an impressive internal memory capable of storing 24,000 measurements per parameter. This is essentially one measurement every ten minutes for six months.

Cera-Diver

The ceramic Cera-Diver is designed specifically for monitoring groundwater in potentially corrosive conditions, such as brackish water and seawater.

The Cera-Diver is available in four ranges for monitoring the following depths:

0 – 33 ft (0 – 10 m)

0 – 66 ft (0 – 20 m)

0 – 164 ft (0 – 50 m)

0 – 328 ft (0 – 100 m)

Measuring 3.54 inches (90mm) in length and 0.86 inches (22mm) in diameter, this highly reliable and compact Diver registers groundwater levels with an accuracy of 0.05% (Full Scale). It is equipped with a memory capable of storing 48,000 measurements per parameter. This is sufficient enough to perform one measurement every ten minutes for an entire year.

CTD-Diver

Frequent monitoring of soil and groundwater quality is traditionally a labor-intensive job. This is also the case if saltwater intrusion or contamination at remediation sites needs to be monitored.

The Van Essen CTD-Diver sets the standard for reliability and longevity in groundwater monitoring. The CTD-Diver is a fully stand-alone sensor with built-in data logger and battery. The compact ceramic casing and sensor and unparalleled conductivity measuring range (0-120 mS/cm) make the CTD-Diver suitable for use at every measuring site.

The CTD-Diver is impervious to the most aggressive substances found in water environments. Its ceramic casing resists when even the strongest metals yield.

CTD-Diver is a highly reliable compact probe for the simultaneous measuring of groundwater level, temperature, and conductivity. Measured values are stored in the probe’s non-volatile internal memory.